Increased digital adoption and deal wins has helped the performance of the IT industry to bounce back in the July-September quarter. What has also benefited the margins of the top tier IT giants is the reduction of travel expenses of more than 70% year-on-year. Travel costs at TCS, Wipro and Infosys, companies which declared their results by Friday, reduced by 65%, 72% and 75% year-on-year respectively in the quarter ended September. The development comes as companies switched to online calls for sales pitches and employees took to remote solving of problems. Savings in travel costs have made a significant difference to the margins of IT firms in the July-September quarter.